ĐKXĐ : \(x,y\ne0\)
Ta có : \(\left\{{}\begin{matrix}\frac{2}{x}+\frac{1}{y}=2\\\frac{6}{x}-\frac{2}{y}=1\end{matrix}\right.\)
=> \(\left\{{}\begin{matrix}\frac{6}{x}+\frac{3}{y}=6\\\frac{6}{x}-\frac{2}{y}=1\end{matrix}\right.\)
=> \(\left\{{}\begin{matrix}\frac{5}{y}=5\\\frac{6}{x}-\frac{2}{y}=1\end{matrix}\right.\)
=> \(\left\{{}\begin{matrix}y=1\\\frac{6}{x}=3\end{matrix}\right.\)
=> \(\left\{{}\begin{matrix}x=2\\y=1\end{matrix}\right.\) ( TM )
Vậy hệ phương trình có nghiệm (x;y)=(2;1)